The human body is like a complex and delicate machine, made up of many small parts. A minor failure of one part can cause the device to fail. Similarly, if this happens in the human body, it can cause abnormalities in the body's functions. Exercising is part of a healthy lifestyle and contributes to improving health and quality of life. People who exercise regularly have a lower risk of death. By exercising, people who exercise increase their life expectancy by two years compared to those who do not exercise. Regular exercise and good physical condition can improve quality of life in a number of ways. Fitness and exercise  help us  look good, feel good and enjoy life. In addition, playing sports is a pleasant way to spend your free time. 
Exercise can help a person develop emotional balance and maintain a strong self-image. Exercise becomes more important with age. In fact, after the age of 30, the heart's pumping capacity decreases by an average of 8% per  decade. Sport is also essential for the overall development of the child. Exercise helps  maintain a healthy weight by increasing our metabolism and using and burning  extra calories. 
Types of exercise 
There are three main types of exercise intensity: 
1) Light exercise Walking is an example of light exercise. Here, the user can talk while exercising. 
2) Moderate exercise: User feels short of breath during exercise. Examples include walking, moderate cycling, or climbing hills. 
3) Vigorous exercise - When performing this exercise, the instructor breathes during the exercise. Compared to the other two forces, the instructor feels that his body has been pushed to the limit. This can include running, fast cycling  and vigorous exercise. 
The importance of exercise 
Regular exercise can improve our health and our physical endurance. It plays a fundamental role in the prevention of cardiovascular diseases. It can help treat dyslipidemia, diabetes and obesity. It can also help lower blood pressure. Regular exercise can reduce the risk of death from coronary heart disease and reduce the risk of stroke and colon cancer. People of all ages can benefit from exercise. 
Exercise can be effective in improving human mental health. It reduces a person's stress and anxiety. When we come home from work or school, we feel exhausted after a long day at work. If we can  walk or run for at least 30 minutes, we feel happy and relaxed. Several studies have shown that a lifestyle that includes exercise can help treat depression. Those who can maintain regular exercise  also reduce the chance of seeing a doctor. Without physical activity, the body's muscles lose  strength, endurance and the ability to function properly. Regular exercise keeps all parts of your body moving. It can improve overall health while reducing the risk of many chronic diseases. Therefore, physical exercise is very important in our lives. 
Conclusion 
Exercise can play an important role in keeping individuals, communities, communities and nations thriving. If the citizens of a country are healthy, it is certain that the country will reach new heights in all aspects of life. Only a healthy generation of the country can achieve the highest scores in various fields so that the country can win the title and glory in the international arena. The first step is always the hardest. But if we can overcome it and train for 21 days without rest, it will be a new start to a healthy life.